Air Quality Monitor

Updated On: 3/31/2023 - 9:30 AM
This page displays current air quality data for the Green Valley monitor, which is operated by the Pima County Department of Environmental Quality. All data are preliminary.

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Current Air Quality: Green Valley Updated: 3/31/2023 - 9:30 AM

Current concentrations for each available pollutant, along with a graph displaying hourly data over the past 48-hours. The colors are using the AQI color scheme to highlight periods of good or poor air quality. Values are updated hourly at 30 minutes past the hour.

Ozone

46 ppb

Past 48-Hours

PM10

6 µg/m3

Past 48-Hours

PM2.5

3 µg/m3

Past 48-Hours


Past Seven Days

Concentration values for the past seven days for each available pollutant. While the table displays concentrations, the color corresponds to the Air Quality Index (AQI).
Date
Ozone
(ppb)
Max 8-Hour Avg
PM10
(µg/m3)
24-Hour Avg
PM2.5
(µg/m3)
24-Hour Avg
3/24/2023
49
7
2.6
3/25/2023
51
14
4.9
3/26/2023
52
12
4.5
3/27/2023
56
12
3.5
3/28/2023
51
9
3.2
3/29/2023
50
9
2.5
3/30/2023
49
7
2.5

Station History

The table displays the current day, month, and all-time high and low concentrations for each pollutant, along with the day on which the value occurred. If a tie occurs, the date displayed will be the most recent occurrence.
Ozone
(ppb)
Max 8-Hour Avg
PM10
(µg/m3)
24-Hour Avg
PM2.5
(µg/m3)
24-Hour Avg
Daily High For March 31
61
3/31/2010
55
3/31/2017
2.2
3/31/2022
Daily Low For March 31
41
3/31/2008
10
3/31/2022
2.2
3/31/2022
Monthly High For March
68
3/23/2013
127
3/21/2004
4.9
3/25/2023
Monthly Low For March
27
3/11/2020
1
3/13/2020
0.9
3/24/2022
All-Time High
76
7/23/2003
434
4/9/2013
12.8
10/4/2022
All-Time Low
0
1/30/2022
0
2/22/2019
0.0
1/7/2022
*Negative values can occur when concentrations are below the detectable limits of the instrument.
Period of Record By Pollutant:
Ozone - 6/30/2003
PM10 - 2/14/2001
PM2.5 - 1/1/2022
Note: Gaps may exist in the period of record and is only for continous monitor data (not filter).

Exceedances This Year

A list of the number of exceedances since the start of the year for each available pollutant. Expand the pollutant to view the date and concentration of each exceedance.
No exceedance days.
No exceedance days.
No exceedance days.
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Historical Data

Access historical data from the monitor. Historical Data >